COMPUTING OF NONLINEAR DAMPING USING THE MOVING AUTOREGRESSIVE MODEL METHOD

机译：用移动自回归模型方法计算非线性阻尼

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Strictly speaking, internal damping of alloy materials is a function of temperature, frequency, strain and strain time rate and so on. Most of the previous papers with regard to damping computing only give a volumetric average when the alloy material is subjected to alternative stress. They cannot accurately describe the natural characteristic of damping. In this paper, the moving autoregressive model method (MARM) is presented to research the relationship between loss factor, strain and frequency of the alloys (Al-33Zn-6Si and Zn-27Al-1Cu). The experimental results show that the loss factor of alloy increases with the increasing strain, and increases with the increasing frequency in low-frequency region (below 400Hz). The damping appears strong nonlinear behavior. The three-dimension graph of the loss factor versus strain and frequency provides useful information for the optimum design of machine parts made from damping alloy.

机译：严格来说，合金材料的内部阻尼是温度，频率，应变和应变时间率等的函数。关于阻尼计算的大多数先前论文仅在合金材料承受替代应力时才给出体积平均值。他们无法准确描述阻尼的自然特性。本文提出了移动自回归模型方法（MARM），研究了合金（Al-33Zn-6Si和Zn-27Al-1Cu）的损耗因子，应变和频率之间的关系。实验结果表明，在低频区域（400Hz以下），合金的损耗因子随应变的增加而增加，随频率的增加而增加。阻尼表现出很强的非线性行为。损耗因数与应变和频率的三维关系图为由阻尼合金制成的机械零件的最佳设计提供了有用的信息。

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来源
《7th Biennial Conference on Engineering Systems Design and Analysis 2004(ESDA 2004) vol.1: Advanced Energy Systems; Advanced Heat Transfer in Engineering Systems; ...》|2004年|P.299-304|共6页
会议地点 Manchester(GB)
作者
Ziying Wu; Hongzhao Liu; Lilan Liu; Daning Yuan; Zhongming Zhang;
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作者单位

Department of mechanical engineering, Xi'an University of Technology, Xi'an, China, Zip: 710048;

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会议组织
原文格式 PDF
正文语种 eng
中图分类机械设计、计算与制图;
关键词
nonlinear damping; strain; frequency; moving AR model;

机译：非线性阻尼;应变;频率;运动AR模型;

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4. COMPUTING OF NONLINEAR DAMPING USING THE MOVING AUTOREGRESSIVE MODEL METHOD [C] . Ziying Wu, Hongzhao Liu, Lilan Liu, Biennial Conference on Engineering Systems Design and Analysis . 2004

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COMPUTING OF NONLINEAR DAMPING USING THE MOVING AUTOREGRESSIVE MODEL METHOD

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